Abstract: The present invention relates to newly identified nucleic acid molecules and polypeptides present in normal and neoplastic cells, including fragments, variants and derivatives of the nucleic acids and polypeptides. The present invention also relates to antibodies to the polypeptides of the invention, as well as agonists and antagonists of the polypeptides of the invention. The invention also relates to compositions containing the nucleic acid molecules, polypeptides, antibodies, agonists and antagonists of the invention and methods for the use of these compositions. These uses include identifying, diagnosing, monitoring, staging, imaging and treating breast, colon, lung, ovarian or prostate cancer and non-cancerous disease states in breast, colon, lung, ovarian or prostate, identifying breast, colon, lung, ovarian or prostate tissue, monitoring and identifying and/or designing agonists and antagonists of polypeptides of the invention.